Question

What is the largest 4-digit number that gives a 7-digit number when squared?

Answer 1

Answer:

9999 is largest 4 digit number, and 100^2 is 10000, or 1 greater than the largest 4 digit number. This means that the closest square root of the largest perfect square is most likely 99. So 99^2 (9801)is the largest perfect square of four digits.

Step-by-step explanation:

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